Issues with CV function in lasso

Hi there,

I am trying to run lasso on a small data set of metabolites, and keep getting an error when it comes to the cross validation.

Here is my code:

x=data;

y=phase;

[B,STATS]=lasso(x,y,'CV',10);

axTrace=lassoPlot(B,STATS);

axCV=lassoPlot(B,STATS,'PlotType','CV');

minMSEModel=STATS.PredictorNames(B(:,STATS.IndexMinMSE)~=0)

sparseModel=STATS.PredictorNames(B(:,STATS.Index1SE)~=0)

And here is my error message:

Warning: This format of input to CROSSVAL may be removed in the future. See 'help crossval'.

> In crossval (line 313)

In lasso (line 517)

In Lasso (line 3)

Undefined operator ':' for input arguments of type 'cvpartition'.

Error in crossval (line 405)

ncompvector = 1:ncomp;

Error in lasso (line 517)

cvMSE = crossval(cvfun,[weights(:) X],Y, ...

Error in Lasso (line 3)

[B,STATS]=lasso(x,y,'CV',10);

This how I have normally run lasso in the past, and appears to also be what is suggested online. Please help!